Siphon Tube on Pressure Gauge

[JonRiley56]

Hey Guys

I have a question about siphon tubes. Is the idea that there will be a slug of water in between the gauge and the steam and that it resides in the siphon tube ? I have two options for my tube. the first one looks like this _o_ and the other one looks like this _ol .

If I use the first one in the opposite orientation than than it is shown above, with the loop "down" i can see how it would act like a trap and protect the gauge from live steam. If I use it in the orientation as shown above it seems like any condensate "plug" will just drain back to the boiler and the gauge will be exposed to steam.

I would like to use the second option in the orientation shown above, coming out, making a loop upwards, and then finishing poiting upwards. My gauge will mount handsomely on that set up. As I look at it though I dont see how it will protect the gauge from live steam.

I have found two classic old gauges and had them calibrated. I would really not want to damage them.

Advice ?

jon

[fredrosse]

Any of the shown orientations will protect the gauge from excessive heat from steam, with the gauge connected to any end in the three figures.